I have been held up several times by pedal cyclists & it can be a pain. The bikers could have pulled over & let the SUV through. However, I would like to know where the SUV driver was going that meant waiting a few minutes would spoil?

Actually, it wasn't that he was being held up by a motorcycle driving along legally or normally, and the bikers couldn't let the SUV through, because they were in the act of illegally shutting down the highway - this is a new trend in some parts of the US, a road version of a flash mob. Cars and or bikers suddenly stop all traffic flow on a major highway, then start performing stunts in the middle of the road for a few minutes, then scatter before police can respond. They were apparently attempting such a shut down when a few cars decided to defy them, they apparently got angry, and started attacking one of the cars and trying to surround and stop him, then started assaulting the car when he panicked and hit the gas to get away.

I think the SUV actually tapped the one guy's tire. I think he was trying to slow the SUV down, perhaps a little too fast, and the SUV touched him. I think that's why they surrounded him.

The bikers were dead wrong and highly illegal. The driver was rash and panicked and caused injury in trying to get away. The one biker didn't necessarily deserve the punishment he got, but they all deserve to be fined/arrested, and the SUV driver didn't necessarily deserve the punishment he got, assaulted and attacked and then beaten by dozens of bikers.

I think there was blame all around.

The biker was intentionally trying to stop the vehicle by stopping short in front of it, unlawfully detaining them. The driver had every right to protect the safety of his family after the bikers brandished weapons. It is unfortunate that someone was injured so badly, but I think the bikers have the overwhelming majority of the blame. Unless new evidence comes to light, the SUV driver should not be prosecuted.

As far as any of the bikers being "innocent", if you hang out with the wrong people, bad things happen. They gathered to do an unlawful activity; namely shutting down the highway to do "tricks". Anything bad that happens is on them.